so Nic your concept of abaya or burqa is wrong, in Islam it said women should cover her body from head to toe that is also a loose dress. and if you look Mother Mary you can very clearly see she is following the Gods instruction. it is not necessary to cover with black color cloth.

and for your info. Islam didnt invent 1400 years ago, neither Prophe Muhammad (pbuh) is the founder of this religion, he is the last prophet who completed the religion as per Allahs instruction.